ANALYSIS OF THE OUDERS 133 



6. St.iincn.s on tlic torus or on tlie liypogyiiotifl (§ 83) petals... 63. 



6. Stamens and petals on the calyx tube (perigynons, § 83).. .68. 



7. Ovaries simple, distinct or one only. Vines or erect shrubs 69. 



7. Ovary compound.. . .8. 



8. Ovary inferior,— wholly adherent to the calyx 70. 



9. Ovary superior,— free from the calyx, or nearly free 9. 



9. Stamens opposite to the petals, and of the same number 72. 



9, Stamens alternate with the petals, or of a different number.... 10 



10. Leaves opposite on the stem 73. 



10. Leaves alternate, compound 76. 



10. Leaves alternate, simple 78. 



11. Stamens 8 times as many as the petals, or more. . . .47. 

 11. Stamens 1 or 2 times as many as the petals, or fewer 12 



12. Pistils distinct and simple, few or one only 48. 



12. Pistils united into a compound ovary. . . .13. 

 13. Ovary free from the calyx. . .14. 

 13. Ovary adherent to the calyx. ..49. 



14. Stamens opposite to the petals, and of the same number 51. 



14. Stamens alternate with the petals, or of a greater number 52. 



15. Flowers regular or nearly so. Fruit never a legume. . . .17. 



15. Flowers irregular (rarely regular), and the fruit a legume.. 16 



16. Stamens 3 or more times as many as the petals 42. 



16. Stamens few and definite, 5-12. . . .43, 

 17. Stamens numerous, 3 or more times as many as the petals. . . .21. 

 17. Stamens few and definite 18. 



18. Ovary free from the calyx, — superior. . . 19. 



18. Ovary adherent to the calyx, — inferior 39. 



19. Pistils one or indefinite (1-15), distinct, simple. . ,30. 

 19. Pistils definite in number, as follows, viz 20, 



20. Carpels (or pistils) 2, united, the short styles icombmed nito 1 ... .81 



20. Carpels 3 or 4, united, the styles or stigmas 3, or 4, or 6 32. 



20. Carpels 5, distinct or united, with 5 distinct styles 37. 



20. Carpels 5, united, and the styles combined into 1. .38. 



21. Stamens on the torus (hypogynous) 22. 



21. Stamens situated on the corolla at base. . . .27. 

 21. Stamens situated on the calyx at the base. . . .28. 



22. Pistils few or many, distinct (at least as to the styies) ... 23. 



22. Pistils (and styles also, if any) completely united 24. 



23. Petals 5 or more, deciduous. Leaves not peltate. Order of the * Croic/oots. 7 

 23. Petals 3, persistent and withering. Floating leaves peltate. Water-shields. 7 

 23. Petals many, deciduous. Leaves all peltate. * Water- beans. 8 



24. Sepals 2 only 26. 



24. Sepals 4, 5, or 6, niostiy 5 ...25 



